Pencil



March 9, 1937. C. F, NQRLlNV 2,072,922

PENCIL Filed Aug. 19, 1935 Patented Mar. 9, 1937 UVNiTED STATES PATENTOFFICE 11 Claims.

The present invention relates to improvements in pencilsV and moreparticularly to manually operated feeding mechanisms for pencils of theso-called magazine type, wherein leads to be successively used are fedas needed from the li magazine into the tip bore of the pencil, thepresent invention being an improvement on that set forth in my pendingapplication, Serial No. 735,174, filed November l5, 1934, and in myprior Patent No. 1,937,779, granted me on December 5, 1933.

'Ihe primary object of the present invention is to provide a simple feedmechanism adapted to the' purpose, which is capable of economicproduction and highly elcient in use.

l Other objects will appear-hereinafter.

The invention consists in the combinations and arrangementsofv partshereinafter described and claimed.f

The invention will be best understood by reference to the accompanyingdrawing forming a part of this specification and in which: f

Figure 1 is an enlarged-sectional view taken longitudinally through sucha pencil showing a mechanismfor the -storage of leads and a feedingmechanism adapted to feed leads therefrom and embodying the invention;

Figure 2, is a section taken substantially on the line 2-2'of Fig. -1; y

Figure 3 isa section taken on the line 3-3 of igure 4 is a sectiontakenon the line 4 4 of Fig. 1;

vFigure 5 is -a top plan view of the sleeve and plunger removed from thebarrel of the pencil;

and

Figure 6 is a sectional view taken on the line 6--6 of Fig. 1.

The embodiment of the invention illustrated in the drawing comprising abarrel I0 havingr a tip IIL provided with a lead bore I2 and a magazinerecess 3 adapted to receive the magazine frame I4, which is providedwith a rotatable cylinder magazine I5 having operating spring I5', leadpockets I6 and stops Il, as best shown in Figs. 1

and 6. A more detailed description of the magazine is set forthinmypco-pending application, Serial No. 753,174, filed November 15, 1934,and therefore requires no further description here.

The rotation of the magazine I5 serves to register the pockets I6successively with the tip bore I2, as will be readily understood.

A reciprocating plunger I8 is mounted in a barrel I0 in registrationwith the lead bore I 2 and is arranged to reciprocate in the guide holeI8.

(Cl. 1Z0-18) At its other end the plunger I8 ls fixed to a. plug I9,which in turn is fixed centrally in a sleeve 20- mounted to reciprocateland rotatev freely in barrel I0. .I

The sleeve 20 is provided with a helical slot 2| which slidably engagesa knobbed stud 22 carried by a spring 23 secured to the barrel I0 by therivet 24, as shown in Fig. 1. The helical slot 'I0 is provided at itsends with enlarged openings 25. and 26 which permits the radial passageof they knob 2l of the stud 22 into and out of sleeve 20. Plug I9 isprovided at its rear end with a cam 28, sleeve 20 with a groove 30,connecting openings' 25 and 26 and plunger I8 carries va compressionspring I9 as shown. Bythis arrangement at'the foremost point of travelof the-plug |19 andthe 2- sleeve 20 the knob 21 is pressed'outwardlybytheA cam 28 through the opening 25, where it isfree to slide in thegroove 30 to the opening26, this movement being accomplished bytheaction of the compression spring `29. vIt is to be .further noted, thatthe stud 22 is held in interlocked engagement with the slot 2| on theforward movement and out of engagement on the return movement of thesleeve 20 by the knob 21.

'Ihe sleeve 20 is held against rotation by'a -i lug 3| slidably mountedin a groove 32 on the cap sleeve 33 as shown in Fig. 1. 'Ihis cap sleeve33. is provided with an outwardly extending cap 34 which serves as'meansfor rotating the sleeve 20 and is further provided with a peripheralslot 35 into which the pin 36, secured to the barrel I0, is free totravel, thereby permitting its rotation buty preventing any longitudinalmovement.

In use, upon the rotation 'of the sleeve 20 by the cap 34 when the partsare in position shown in Fig. 1, the stud 22 travels in the helical slot2| producing a forward movement ofthe sleeve 20, the plug I9 and theplunger I8, compressing the spring 29, and forcing a lead I6 forwardinto the tip bore I2. At the end of the forward movement the knob 21 ofthe stud 22 is pressed through the opening 25 into the groove 30 therebyreleasing the stud from engagement with the slot 2|l and permitting thecompression spring` 29 to move the plunger mechanism rearwardly and tostarting position, the spring 23 serving to return the knob 2l throughthe` opening 26 and thereby completing one `circle of operations.

While I have illustrated and described the preferred construction forcarrying the invention into effect, these are capable of variation andmodification without departing from the spirit of the invention. I,therefore, do not wish to be limited to the precise details described,but

a reciprocating plunger in alignment with andv desire to avail myself ofsuch variations and modifications as fall within the scope of theappended claims.

l. A pencil barrel; a lead magazine mounted in said barrel; a pencil tiphaving a lead bore and a reciprocating plunger in alignment with andarranged to feed leads from saidi magazine through said tip bore;rotatable means on said barrel 'for forwardly actuating said plunger ininterlocked engagement; rotatable means for releasing said plunger fromsaid forwardly actuating means; and automatic means for returning saidplunger to its retracted position upon the completion of the forwardstroke.

2. A pencil barrel; a lead magazine mounted in said barrel; a pencil tiphaving a lead bore and a reciprocating plunger in alignment with andarranged to feed leads from said magazine through said tip bore;rotatable means on said barrel for forwardly actuating said plunger ininterlocked engagement; rotatable means for releasing said plunger fromsaid forwardly actuating means; and spring actuated means for returningsaid plunger to its retracted position upon the com` pletion of theforward stroke,

3. A pencil barrel; a lead magazine mounted in said barrel; a pencil tiphaving a lead bore and arranged to feed leads from said magazine throughsaid tip bore; rotatable means on said barrel for forwardly actuatingsaid plunger in interlocked engagement; rotatable means for rei leasingsaid plunger from said forwardly actuating means; and means for slidablyreturning said plunger to its retracted' position upon the completion ofthe forward stroke.

4. A pencil barrel; a lead magazine mounted in said barrel; a pencil tiphaving a lead bore and a reciprocating plunger in alignment with andarrangedto feed leads from said magazine through said tip bore; atubular feed sleeve connected with said plunger rotatably and slidablymounted in said barrel and having a helical slot in its walls; a stud onsaid barrel engaging said slot;`

and means for rotatingsaid sleeve while permitting longitudinal movementthereof.

5. A'pencil barrel; a lead magazine mounted inV said barrel; a penciltip having a lead bore and a' reciprocating plunger in alignment withand arranged to feed leads from said magazine through said tip bore; afeed sleeve connected with said plunger loosely mounted in said barreland having a helical slot in its Walls; enlarged openings at each end ofsaid slot and a longitudinal groove in its periphery connecting saidopenings; a spring held knobbed stud on said barrel engaging said slot;and means for rotating said sleeve while permitting longitudinalmovement thereof.

6. A pencil barrel; a lead magazine mounted in said barrel; a pencil tiphaving a lead bore and a reciprocating plunger in alignment with andarranged to feed leads from said magazine through said tip bore; a feedsleeve connected with said plunger loosely mounted in said barrel andhaving a helical slot in its walls; a stud on said barrel engaging saidslot; a rotatable cap on the end of the barrel opposite its tip; asleeve on said cap telescoping the feed sleeve and having a slidingconnection therewith; and a cam on said feed sleeve operating said studto effect reciprocaton of said plunger upon rotation of said cap.

7. A pencil barrel; a lead magazine mounted in said barrel; a pencil tiphaving a lead bore and a reciprocating spring held plunger in alignmentwith and arranged to feed leads from said magazine through said tipbore; a feed sleeve connected with said plunger loosely mounted in saidbarrel and having a helical slot in its walls, enlarged openings at eachend of said slot and a longitudinal groove in its periphery connectingsaid openings, a spring held knobbed stud on said barrel engaging saidslot, a rotatable cap on the'end of the barrel opposite its tip, asleeve on said cap telescoping the vfeed sleeve and having a slidingconnection therewith; and a cam on said feed sleeve operating said studat the forward end, the movement of said feed sleeve to force said studoutwardly through the corresponding opening into said groove.

8. In a pencil, a plunger feed mechanism comprising a pencil barrel; atubular feeding sleeve rotatably and' slidably loosely mounted.' in saidbarrel at one end thereof and having a helical slot in its walls; aplunger connected with said sleeve; av stud on said barrel engaging saidslot; means guidably positioning said stud relative to said sleeve andslot and means for rotating said rotatably and slidably loosely mountedlin said' barrel at one end thereof and having 'a helical slot'in itswalls; a plunger connected with said sleeve; a spring held stud on saidbarrel engag' ing said slot; meansV guidably positioning said studrelative to'said'sleeve and slot; and means for rotating said sleevewhile permitting longif tudinal movement thereof.

l0. In a pencil, a plunger feed mechanism com# prising a pencil barrel;a tubular feeding sleeve rotatably and slidably loosely mounted in saidbarrel atone end thereof and having a. helical slot in its walls; aplunger connected with said sleeve; a spring held headed stud on saidVbarrel engaging said slot; means guidably positioning said studrelative to said sleeve and slot'; and

means for rotating said sleeve While permitting longitudinal movementthereof.

11. In a pencil, a plunger feed mechanism, comprising a pencil barrel; afeeding sleeve loosely mounted in said barrel at one end thereof andhaving a helical slot in its walls, enlarged openings at each end ofsaid slot and a longitudinal groove in its periphery connecting saidopenings; a spring held knobbed stud on said barrel engaging said slot;a rotatable cap on said end of the barrel; a slidable connection on saidcap slidably connecting said sleeve therewith; and a cam on said feedsleeve operating said stud to effect reciprocation of said plunger uponrotation of said cap.

CLARENCE F. NORLIN.

